SB20260720200 - Improper control of a resource through its lifetime in Linux kernel intel igc driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-64035)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper state management in igc_fpe_init_smd_frame() when initializing SMD transmit frames. A local user can trigger transmission of an SMD skb to cause a denial of service.

The issue arises because a reused igc_tx_buffer entry may retain a stale XDP or XSK type, causing TX completion to use the wrong cleanup path.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1c8587bd025244aa52061f5ceecbf5e68a1063d9
• https://git.kernel.org/stable/c/1f83545f432d106d5fc71d3997b2d382104ebcc4
• https://git.kernel.org/stable/c/5acc641e590e008caaed480ed9ffae47cf7ecbdf